Shiv, you said "Replace your stock lpfp", do you mean with another stock one or is there an upgraded one? I get maxed fuel trims and limp modes just running 30% e85, I'm fairly certain my LPFP isn't up to the task.

Anyone know the BMW Part number for LPFP?

We threw the code when I was around 67% E85 and replaced it with a stock one.

Shiv, you said "Replace your stock lpfp", do you mean with another stock one or is there an upgraded one? I get maxed fuel trims and limp modes just running 30% e85, I'm fairly certain my LPFP isn't up to the task.

Anyone know the BMW Part number for LPFP?

16 14 7 163 298 Pump with level sensor (inside passenger side of the tank), $333.88 retail, less from online BMW parts dealers such as getbmwparts.com.

If the LPFP doesn't cure it, it may be a clogged fuel filter and/or bad pressure regulator. Try just replacing the pump unit, first, then if you still have problems (haven't seen any reported problems with the fuel filter/regulator unit yet) then you may need to replace that unit as well. The filter and regulator are together inside the tank, no more external fuel filter like older cars.

I'm sold as well. The ability to just throw whatever fuel you need to put into the tank without having to reflash the ECU is going to be amazing. Not to mention the power gains on an otherwise stock car. I can't wait until Monday rolls around so I can get the ball rolling.

I'm sold as well. The ability to just throw whatever fuel you need to put into the tank without having to reflash the ECU is going to be amazing. Not to mention the power gains on an otherwise stock car. I can't wait until Monday rolls around so I can get the ball rolling.

No, it adjusts the timing and boost correctly according to the ethanol content. Fuel pressure will always be constant.

A reflash is part of running the flex-fuel kit.

I think you've misinterpreted what I meant. The piggyback fuel volume limit is defined by the largest constriction in the hardware, be it health or the combined upper/lower limits of each individual component. Two people could have the same mods and piggyback, one person with trims at 20% and the next person pegged at 34%.

I didn't know that the FF kit also came with a flash. If so then you shouldn't have an issue with OL fueling. It seems like they have adjusted it moreso with their latest flash to keep trims closer to zero.